Texas Instruments TPS1689x 20A Stackable eFuse
Texas Instruments TPS1689x 20A Stackable eFuse is an integrated high-current power management and circuit protection solution in a small package. The device uses very few external components to provide multiple protection modes and is a robust defense against short circuits, overloads, and excessive inrush current. The integrated PMBus interface enables a host controller to control, monitor, and configure the system in real time. Key system parameters can be read back for remote telemetry. Various coefficients and protection/warning thresholds can be stored in non-volatile configuration memory or configured through PMBus. An integrated, accurate, and fast sense-analog load-current monitor enables advanced dynamic platform power management and predictive maintenance, such as Intel PSYS and PROCHOT, to optimize server and datacenter performance. The Blackbox fault recording feature helps debug field failures/returns. For higher current support, Texas Instruments TPS1689x can be connected in parallel with TPS1685x. The devices are characterized for operation over a junction temperature range of –40°C to +125°C.
Features
- 9V to 80V input operating voltage range
- 92V absolute maximum rating
- Withstands negative transient voltages up to –5V at the output
- PMBus interface for telemetry, control, configuration, and debug
- PIN/EIN/VIN/VOUT/IIN temperature and fault monitoring
- VIN/VOUT monitoring accuracy: ±0.5%
- Programmable overcurrent protection
- Adjustable overcurrent threshold of 2A to 20A
- Programmable transient overcurrent timer (OC_TIMER)
- Programmable slew rate control (dvdt)
- Programmable Power Good/fault/alert indication
- Programmable overtemperature protection
- Internal non-volatile memory for user configuration
- Blackbox fault recording with option to store in external EEPROM
- Integrated FET with low ON-resistance of RON = 3.5mΩ (typ.)
- Fast trip response to severe overcurrent (short-circuit) events
- Precise analog load current monitoring (IMON) with < 1% error over 50% to 100% of max current (TA = 25°C)
- QFN 6mm × 5mm small footprint with IPC9592B clearance for 60V
Applications
- Server and high-performance computing
- Network interface cards
- Graphics and hardware accelerator cards
- Datacenter switches and routers
- Input hotswap and hotplug
- Fan trays
Simplified Schematic
